CN109346671A - A kind of anode of lithium ion battery slurry and the preparation method and application thereof - Google Patents
A kind of anode of lithium ion battery slurry and the preparation method and application thereof Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
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Abstract
The present invention provides a kind of anode of lithium ion battery slurry and the preparation method and application thereof, anode slurries, comprising mending lithium glue, anode active material, conductive agent and binder；Benefit lithium glue is the mixture of carboxymethyl cellulose lithium, sodium carboxymethylcellulose and deionized water, and benefit lithium gelatin concentration is mass fraction 1.0~1.2%；Wherein, the mass ratio of carboxymethyl cellulose lithium and sodium carboxymethylcellulose is 1:9~4:6.The preparation method of anode slurry includes mending the preparation of lithium glue, and above-mentioned benefit lithium glue is added into the mixture of anode active material and conductive agent for point three steps, and controls mixing speed and mixing time, finally add binder and stir, and obtains anode slurry.The coulombic efficiency for the first time of the lithium ion battery prepared with anode slurry provided by the invention is in 91% or more, 500 week circulation conservation rate 97% or more.
Description
Technical field
The present invention relates to technical field of lithium ion, in particular to a kind of anode of lithium ion battery slurry and its preparation side
Method and application.
Background technique
Lithium ion battery has high voltage, high-energy density, long circulation life and security performance compared to other secondary cells
The advantages such as good, are widely used on the fields such as portable rechargeable equipment and new-energy automobile.The anode of common lithium battery
It is to be formed by being coated on copper foil current collector surface after the mixing of anode active material, conductive agent and binder.It is carried out to lithium battery
During initial charge, because anode surface will form SEI and consume a part of active lithium-ion, the coulomb for the first time of battery is shown as
Efficiency only has 80~90% or so；And the capacity of battery generally gradually decreases in long-term cyclic process, shows as battery
Capacity is lower, and is primarily due in charge and discharge process lithium ion and participates in irreversible side reaction and constantly reduce to cause.Generally guaranteeing
Under the premise of safe design, the capacity of cathode design is less than anode, i.e., generally uses quantitative anode, and uses certain excessive
Cathode, so embedding lithium of cathode be not up to saturation state precipitation.So wanting to solve lithium ion disappearing in charge and discharge process
Consumption, it is general to mend lithium technology using in anode, solve the problems, such as that coulombic efficiency is low for the first time and circulation volume reduces with this.
It is mended in lithium process in anode and many patents and method has been disclosed, specifically included physics and chemistry mends lithium side
Method.In the presence of major problem is that physics benefit lithium process complexity, needs inert gas shielding, cost price is high.Chemistry mends lithium
Negative electrode lithium ion ionization precipitation problem, and the stirring technique method of specific optimization anode are not accounted for, slurry is caused to disperse
It is bad, it is unfavorable for volume production, falls flat.Such as Chinese patent CN106848270 A discloses a kind of cathode benefit lithium slurry
Material, cathode and lithium secondary battery propose that add performed polymer by heating method on the negative electrode tab surface prepared mixes with lithium powder
Object, this operating method brings new variable, while lithium powder has certain uncontrollability and risk.It is for example Chinese again
It is mentioned in 105336961 A of patent CN and sodium carboxymethylcellulose (CMC- is substituted using carboxymethyl cellulose lithium (CMC-Li) completely
Na it) is used as anode binder, lithium ion Overdosing problems is not fully considered, causes the lithium ion for ionizing out in itself in anode table
Problem is precipitated in face, while also cannot achieve volume production without the stirring technique method of specific anode, is extremely difficult to improve library for the first time
Human relations efficiency and macrocyclic desired effect.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of anode of lithium ion battery slurry and preparation method thereof with answer
With, it is therefore an objective to it improves the coulombic efficiency for the first time of lithium lithium battery, improve cycle life.
In order to achieve the above object, the technical scheme is that
A kind of anode of lithium ion battery slurry, comprising mending lithium glue, anode active material, conductive agent and binder；It is described
Benefit lithium glue is the mixture of carboxymethyl cellulose lithium, sodium carboxymethylcellulose and deionized water；Wherein, mending lithium gelatin concentration is
Mass fraction 1.0~1.2%；The mass ratio of carboxymethyl cellulose lithium and sodium carboxymethylcellulose is 1:9~4:6；The anode
Active material includes natural graphite and/or artificial graphite and/or silicon-carbon cathode；The conductive agent includes conductive black and/or carbon
Nanotube and/or graphene；The binder includes carboxymethyl cellulose or butadiene-styrene rubber.
Further, the slurry viscosity is 3000~6000mPas.
Further, the slurry partial size is not more than 30 μm.
Further, the slurry solid content is 42~52%.
Further, in parts by mass, in the slurry carboxymethyl cellulose lithium with totally 1~3 part of sodium carboxymethylcellulose,
The anode active material is 92~96 parts, and the conductive agent is 1~2 part, and the binder is 1~3 part.
Further, in parts by mass, carboxymethyl cellulose lithium and sodium carboxymethylcellulose totally 2.5 in the slurry
Part, the anode active material is 95 parts, and the conductive agent is 1.2 parts, and the binder is 1.3 parts.
The present invention also provides a kind of preparation methods of anode of lithium ion battery slurry, include the following steps:
In parts by mass, 1) be in mass ratio by carboxymethyl cellulose lithium and sodium carboxymethylcellulose 1:9~4:6 ratio
Mixing, is configured to 1~3 part, adds deionized water, at -90~-85Kpa with the revolving speed of 800~1500r/min stirring 3~
5 hours, obtain the benefit lithium glue that concentration is mass fraction 1.0~1.2%；
2) 92~96 parts and 1~2 part of conductive agent mixing of anode active material are taken, under normal pressure with 300~500r/min's
Revolving speed stands 20min or more after stirring 1~2h, obtains mixture；
3) the benefit lithium glue of resulting 30~40% mass of step 1) is added for the first time into mixture obtained by step 2), with
The revolving speed of 400~800r/min stirs 30~180min；
The benefit lithium glue of second of addition resulting 20~40% mass of step 1), is stirred with the revolving speed of 400~800r/min
Mix 30~180min；
Third time be added resulting 20~40% mass of step 1) benefit lithium glue, with 600~1000r/min stirring 2~
3h；
It is eventually adding 1~3 part of binder, 30~60min is stirred to get lithium ion with the revolving speed of 400~700r/min
Galvanic anode slurry.
The present invention also provides a kind of anode sheet of lithium ion battery, including any of the above-described anode of lithium ion battery slurry or
The anode of lithium ion battery slurry being prepared according to the method described above.
The present invention also provides a kind of lithium ion batteries, including cathode sheets and above-mentioned anode sheet of lithium ion battery.
Further, in parts by mass, the cathode sheets include 92~98 parts of cathode active materials, 1~2 part of conductive agent with
And 1.5~2.5 parts of positive electrode binders.
Above scheme of the invention have it is following the utility model has the advantages that
The present invention is using sodium carboxymethylcellulose (CMC-Na) and carboxymethyl cellulose lithium (CMC-Li) in Anode of lithium cell
Application is mixed on slurry, replaces CMC-Na with a part of CMC-Li, additionally can be provided lithium ion to entire lithium battery, be supplemented lithium
The lithium ion consumed during ion battery initial charge and circulating battery, to improve the coulombic efficiency and electricity of initial charge
In the pond service life, the mode of especially part substitution can avoid excessive lithium-ion electric and be precipitated from and anode surface, to improve
The security performance of battery.
Anode of lithium ion battery slurry provided by the invention is using CMC-Na and CMC-Li on Anode of lithium cell slurry
Mixing application, the viscosity compared to individual CMC-Na prepare glue decrease, and slurry fineness also decreases, glue in embodiment
Fluid viscosity controls within the scope of 3000~6000mPa.s, and slurry fineness illustrates that the dispersion effect of glue is good less than 27 μm, also
It can play the role of cure pastes, be conducive to subsequent viscosity control and the coating operations of sizing mixing.
The preparation method of anode slurry provided by the invention is in three times to the mixture of anode active material and conductive agent
Lithium glue is mended in middle addition, and controls mixing speed and mixing time, can be seen that from comparative example, the lithium being prepared by this method from
The coulombic efficiency for the first time and battery life of sub- battery are better than traditional handicraft.
The coulombic efficiency for the first time of lithium ion battery prepared by the present invention is in 91% or more, 500 week circulation conservation rate 97%
More than.
Detailed description of the invention
Fig. 1 is the flow chart of present invention preparation anode slurry.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Embodiment 1
(1) preparation of cathode sheets
Using 10 ampere-hour soft roll structure lithium batteries, anode uses LiFePO 4 material (LiFePO4), cathode uses artificial stone
Ink material, conductive agent use conductive black (SP), and binder uses Kynoar (PVDF).In parts by mass, 97 parts are taken
LiFePO4, 1 part of SP, 2 parts of PVDF obtain the yin by design size by conventional ripening mixing, coating, roll-in, cutting, film-making
Pole piece.
(2) anode mends the preparation of lithium glue
It weighs and mixes by CMC-Li:CMC-Na=10:90 mass percent, be added in glue tank, add deionized water,
Gelatin concentration is controlled 1.2%, 4h is stirred at -85Kpa, revolving speed 900r/min obtains glue.Re-test gelatin viscosity is surveyed
Test result is shown in Table 1.
In parts by mass, 95 parts of artificial graphites are taken, 1.2 parts of SP are 1.3 parts by CMC (CMC-Li+CMC-Na) and take above-mentioned system
Standby obtained glue, then take 2.5 parts of butadiene-styrene rubber.Normal pressure mixing 1h in a mixing bowl, revolving speed is added in above-mentioned artificial graphite and SP
Above-mentioned glue is added in batches after 400r/min, rear standing 1h.Add 30% glue quality to a mixing bowl, revolving speed 600r/ for the first time
Min stirs 1h, makes sizing material at " dry mud " form；Second plus 40% glue quality arrive a mixing bowl, revolving speed 700r/min stirring 1h,
Make sizing material at " sticky " form；Third time plus 30% glue quality arrive a mixing bowl, revolving speed 900r/min stirring 2h, make sizing material at
" stream slurry " form；2.5 parts of butadiene-styrene rubber binders are eventually adding, revolving speed 500r/min stirs 30min, obtains anode slurry.
Last test slurry viscosity, fineness and solid content, test result are shown in Table 1.
(3) preparation of anode strip
By the anode slurry prepared by designed surface density coated in 8 μm of copper foil current collectors.By roll-in, divide
It cuts, film-making obtains the anode strip by design size.
(4) the benefit lithium anode piece of preparation is assembled into battery together with cathode sheets and diaphragm that routine is not dealt with, passed through
Subsequent normal process steps: encapsulation-baking-fluid injection-chemical conversion-secondary encapsulation-shelves-the processes processing such as partial volume.
(5) statistics battery is in the efficiency value and room temperature 1C loop test of first charge-discharge process as a result, being shown in Table 2.
Embodiment 2
(1) preparation of cathode sheets
Using 10 ampere-hour soft roll structure lithium batteries, anode uses LiFePO 4 material (LiFePO4), cathode uses artificial stone
Ink material.In parts by mass, 95 parts of LiFePO are taken4, 2.5 parts of SP, 2.5 parts of PVDF, by conventional ripening mixing, coating, roll-in,
Cutting, film-making obtain the cathode sheets by design size.
(2) anode mends the preparation of lithium glue
It weighs and mixes by CMC-Li:CMC-Na=20:80 mass percent, be added in glue tank, deionized water, control is added
For gelatin concentration processed 1.0%, vacuum -90Kpa stirs 3h, revolving speed 1200r/min glue.Gelatin viscosity is tested, test result is shown in
Table 1.
By weight, 92 parts of graphite are taken, 2 parts of graphenes are 3 parts by CMC (CMC-Li+CMC-Na) and take above-mentioned be prepared into
The glue arrived, then take 3 parts of butadiene-styrene rubber.Normal pressure mixing 2h, revolving speed 300r/ in a mixing bowl is added in above-mentioned graphite and graphene
Above-mentioned glue is added in batches after min, rear standing 30min.Add 30% glue quality to a mixing bowl, revolving speed 600r/min for the first time
1h is stirred, makes sizing material at " dry mud " form；Second plus 40% glue quality arrive a mixing bowl, revolving speed 700r/min stirring 1h makes
Sizing material is at " sticky " form；Third time plus 30% glue quality arrive a mixing bowl, revolving speed 900r/min stir 2h, make sizing material at " flow
Slurry " form；3 parts of butadiene-styrene rubber binders are eventually adding, revolving speed 500r/min stirs 30min, obtains anode slurry.
Last test slurry viscosity, fineness and solid content, test result are shown in Table 1.
(3) preparation of anode strip
By the anode slurry prepared by designed surface density coated in 8 μm of copper foil current collectors.By roll-in, divide
It cuts, film-making obtains the anode strip by design size.
(4) the benefit lithium anode piece of preparation is assembled into battery together with cathode sheets and diaphragm that routine is not dealt with, passed through
Subsequent normal process steps: encapsulation-baking-fluid injection-chemical conversion-secondary encapsulation-shelves-the processes processing such as partial volume.
(5) statistics battery is in the efficiency value and room temperature 1C loop test of first charge-discharge process as a result, being shown in Table 2.
Embodiment 3
(1) preparation of cathode sheets
Using 10 ampere-hour soft roll structure lithium batteries, anode uses LiFePO 4 material (LiFePO4), cathode uses artificial stone
Ink material.By mass parts, 96 parts of LiFePO are taken4, 1.5 parts of SP, 2.5 parts of PVDF by conventional ripening mixing, coating, roll-in, divide
It cuts, film-making obtains the cathode sheets by design size.
(2) anode mends the preparation of lithium glue
It weighs and mixes by CMC-Li:CMC-Na=30:70 mass percent, be added in glue tank, deionized water, control is added
For gelatin concentration processed 1.1%, vacuum -85Kpa stirs 4h, revolving speed 900r/min；Prepare glue, viscosity control exist for test
3000~6000mPas, test result are shown in Table 1.
95 parts of graphite are taken, 2 parts of silicon-carbon cathodes are 1.5 parts by CMC (CMC-Li+CMC-Na) and take the above-mentioned glue being prepared
Liquid, then take 1 part of carboxymethyl cellulose.
Normal pressure mixing 1.5h, revolving speed 500r/min in a mixing bowl is added in above-mentioned graphite and silicon-carbon cathode and stands 1.5h afterwards
Above-mentioned glue is added in batches afterwards.For the first time plus 30% glue quality arrive a mixing bowl, revolving speed 600r/min stirring 1h, make sizing material at
" dry mud " form；Second plus 40% glue quality arrive a mixing bowl, revolving speed 700r/min stirring 1h makes sizing material at " sticky " shape
State；Third time plus 30% glue quality arrive a mixing bowl, and revolving speed 900r/min stirs 2h, make sizing material at " stream slurry " form；Finally plus
Enter 1 part of carboxymethyl cellulose binder, revolving speed 500r/min stirs 30min, obtains anode slurry.
Last test slurry viscosity, fineness and solid content, test result are shown in Table 1.
(3) preparation of anode strip
By the anode slurry prepared by designed surface density coated in 8 μm of copper foil current collectors.By roll-in, divide
It cuts, film-making obtains the anode strip by design size.
(4) the benefit lithium anode piece of preparation is assembled into battery together with cathode sheets and diaphragm that routine is not dealt with, passed through
Subsequent normal process steps: encapsulation-baking-fluid injection-chemical conversion-secondary encapsulation-shelves-the processes processing such as partial volume.
(5) statistics battery is in the efficiency value and room temperature 1C loop test of first charge-discharge process as a result, being shown in Table 2.
Embodiment 4
(1) preparation of cathode sheets
Using 10 ampere-hour soft roll structure lithium batteries, anode uses LiFePO 4 material (LiFePO4), cathode uses artificial stone
Ink material.By mass parts, 92 parts of LiFePO are taken4, 1 part of SP, 1.5 parts of PVDF by conventional ripening mixing, coating, roll-in, divide
It cuts, film-making obtains the cathode sheets by design size.
(2) anode mends the preparation of lithium glue
It weighs and mixes by CMC-Li:CMC-Na=40:60 mass percent, be added in glue tank, deionized water, control is added
For gelatin concentration processed 1.2%, vacuum -85Kpa stirs 5h, revolving speed 1500r/min；Prepare glue, viscosity control exist for test
3000~6000mPas, test result are shown in Table 1.
96 parts of artificial graphites are taken, 1 part of conductive black is 1 part by CMC (CMC-Li+CMC-Na) and takes above-mentioned be prepared
Glue and 1.5 parts of butyl rubbers.
Normal pressure mixing 2h, revolving speed 450r/min in a mixing bowl is added in above-mentioned graphite and carbon nanotube, is divided after rear standing 1h
Above-mentioned glue is added in batch.For the first time plus 40% glue quality arrive a mixing bowl, revolving speed 500r/min stir 3h, make sizing material at " do
Mud " form；Second plus 20% glue quality arrive a mixing bowl, revolving speed 600r/min stirring 3h makes sizing material at " sticky " form；The
Three times plus 40% glue quality is to a mixing bowl, and revolving speed 1000r/min stirs 3h, makes sizing material at " stream is starched " form；It is eventually adding 1.5
Part butyl rubber binder, revolving speed 700r/min stir 45min, obtain anode slurry.
Last test slurry viscosity, fineness and solid content, test result are shown in Table 1.
(3) preparation of anode strip
By the anode slurry prepared by designed surface density coated in 8 μm of copper foil current collectors.By roll-in, divide
It cuts, film-making obtains the anode strip by design size.
(4) the benefit lithium anode piece of preparation is assembled into battery together with cathode sheets and diaphragm that routine is not dealt with, passed through
Subsequent normal process steps: encapsulation-baking-fluid injection-chemical conversion-secondary encapsulation-shelves-the processes processing such as partial volume.
(5) statistics battery is in the efficiency value and room temperature 1C loop test of first charge-discharge process as a result, being shown in Table 2.
Embodiment 5
Difference from Example 2 is: the stirring technique method of anode slurry.For the first time plus 35% glue quality is to stirring
Cylinder is mixed, revolving speed 400r/min stirs 2h, makes sizing material at " dry mud " form；Add 35% glue quality to a mixing bowl, revolving speed for the second time
400r/min stirs 2h, makes sizing material at " sticky " form；To a mixing bowl, revolving speed 600r/min is stirred for third time plus 30% glue quality
3h is mixed, makes sizing material at " stream is starched " form；3 parts of butadiene-styrene rubber binders are eventually adding, revolving speed 400r/min stirs 1h.It is other with it is real
It is identical to apply example 2, obtains slurry, last test slurry viscosity, fineness.Test result is shown in Table 1 and table 2.
Embodiment 6
Difference from Example 3 is: adding 40% glue quality to a mixing bowl, revolving speed 800r/min stirring for the first time
30min makes sizing material at " dry mud " form；Second plus 40% glue quality arrive a mixing bowl, revolving speed 800r/min stirring 30min,
Make sizing material at " sticky " form；Third time plus 20% glue quality arrive a mixing bowl, revolving speed 800r/min stirring 2.5h, make sizing material at
" stream slurry " form；It is eventually adding 1 part of carboxymethyl cellulose binder, revolving speed 500r/min stirs 0.5h.It is other with 2 phase of embodiment
Together, slurry, last test slurry viscosity, fineness are obtained.Test result is shown in Table 1 and table 2.
Comparative example 1
Difference from Example 1 is: the proportion that anode mends lithium glue is different.Be CMC-Na in CMC, it is other with it is real
It is identical to apply example 1, test result is shown in Table 1 and table 2.
Comparative example 2
Difference from Example 1 is: the stirring technique method of anode slurry.Using conventional wet process stirring technique；
Revolving speed 600r/min in glue is added in SP, stirs 3h；Artificial graphite is added, revolving speed 900r/min stirs 5h；It is eventually adding
2.5% mass stirs 0.5h than butadiene-styrene rubber binder, revolving speed 500r/min.It is other same as Example 2, slurry is obtained, most
Testing size viscosity, fineness afterwards.Test result is shown in Table 1 and table 2.
Table 1: embodiment and comparative example data slurry form data
Table 2: embodiment and comparative example data performance test data
As can be seen from Table 1, the anode slurry viscosity prepared in Examples 1 to 6 is 3000~6000mPas, slurry grain
Diameter is not more than 30 μm, and slurry solid content is between 42% to 52%.
After increasing CMC-Li weight ratio in CMC glue in Examples 1 to 6, gelatin viscosity has certain reduction, is just controlling
Intermediate fluctuation within the scope of 3000~6000mPa.s is made, illustrates that the dispersion effect of glue preparation is good.Comparative example 1 does not add CMC-
Li, gelatin viscosity are up to 5880mPa.s, and anode slurry viscosity reaches 5470mPa.s, are unfavorable for subsequent viscosity control of sizing mixing,
And painting process operation；And comparative example 2 causes anode slurry viscosity obviously relatively low using traditional wet process stirring technique, only
3050mPa.s is equally unfavorable for coating operations.From the point of view of slurry fineness, Examples 1 to 6 is significantly lower than comparative example 1~2, this says
Bright addition CMC-Li cooperates improved stirring technique method to can be very good dispersion and cure pastes characteristic.
Equally as can be seen from Table 2, the coulombic efficiency for the first time of Examples 1 to 6 reaches 91% or more, hence it is evident that better than comparison
Example 1~2；500 weeks capacity retention ratios of circulation are in 98% or so, far superior to the 93% of comparative example, this explanation is using benefit lithium
Scheme and stirring technique of the present invention can finally reach the beneficial effect for improving coulombic efficiency for the first time and improving cycle life.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of anode of lithium ion battery slurry, which is characterized in that comprising mending lithium glue, anode active material, conductive agent and gluing
Tie agent；It is described to mend the mixture that lithium glue is carboxymethyl cellulose lithium, sodium carboxymethylcellulose and deionized water；Wherein, lithium is mended
Gelatin concentration is mass fraction 1.0~1.2%；The mass ratio of carboxymethyl cellulose lithium and sodium carboxymethylcellulose is 1:9~4:
6；The anode active material includes natural graphite and/or artificial graphite and/or silicon-carbon cathode；The conductive agent includes conductive charcoal
Black and/or carbon nanotube and/or graphene；The binder includes carboxymethyl cellulose or butadiene-styrene rubber.
2. anode of lithium ion battery slurry as described in claim 1, which is characterized in that the slurry viscosity be 3000~
6000mPas。
3. anode of lithium ion battery slurry as described in claim 1, which is characterized in that the slurry partial size is not more than 30 μm.
4. anode of lithium ion battery slurry as described in claim 1, which is characterized in that the slurry solid content is 42~52%.
5. anode of lithium ion battery slurry as described in claim 1, which is characterized in that in parts by mass, carboxylic first in the slurry
Base cellulose lithium with totally 1~3 part of sodium carboxymethylcellulose, the anode active material be 92~96 parts, the conductive agent be 1~
2 parts, the binder is 1~3 part.
6. anode of lithium ion battery slurry as described in claim 1, which is characterized in that in parts by mass, carboxylic first in the slurry
Base cellulose lithium with totally 2.5 parts of sodium carboxymethylcellulose, the anode active material be 95 parts, the conductive agent be 1.2 parts, institute
Stating binder is 1.3 parts.
7. a kind of preparation method of anode of lithium ion battery slurry, which comprises the steps of:
In parts by mass, 1) ratio that carboxymethyl cellulose lithium and sodium carboxymethylcellulose are 1:9~4:6 in mass ratio is mixed
It closes, is configured to 1~3 part, adds deionized water, stir 3~5 at -90~-85Kpa with the revolving speed of 800~1500r/min
Hour, obtain the benefit lithium glue that concentration is mass fraction 1.0~1.2%；
2) 92~96 parts and 1~2 part of conductive agent mixing of anode active material are taken, under normal pressure with the revolving speed of 300~500r/min
20min or more is stood after stirring 1~2h, obtains mixture；
3) the benefit lithium glue of resulting 30~40% mass of step 1) is added, for the first time into mixture obtained by step 2) with 400
The revolving speed of~800r/min stirs 30~180min；
The benefit lithium glue of second of addition resulting 20~40% mass of step 1) stirs 30 with the revolving speed of 400~800r/min
~180min；
The benefit lithium glue of resulting 20~40% mass of step 1) is added in third time, stirs 2~3h with 600~1000r/min；
It is eventually adding 1~3 part of binder, 30~60min is stirred to get lithium ion battery with the revolving speed of 400~700r/min
Anode slurry.
8. a kind of anode sheet of lithium ion battery, including any anode of lithium ion battery slurry of claim 1~6 or according to power
The anode of lithium ion battery slurry that benefit requires 7 the methods to be prepared.
9. a kind of lithium ion battery, which is characterized in that including cathode sheets and anode sheet of lithium ion battery according to any one of claims 8.
10. lithium ion battery as claimed in claim 9, which is characterized in that in parts by mass, the cathode sheets include 92~98
Part cathode active material, 1~2 part of conductive agent and 1.5~2.5 parts of positive electrode binders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811382573.XA CN109346671A (en) | 2018-11-20 | 2018-11-20 | A kind of anode of lithium ion battery slurry and the preparation method and application thereof |
Applications Claiming Priority (1)
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| US20190267609A1 (en) * | 2018-02-26 | 2019-08-29 | Ningde Amperex Technology Limited | Negative electrode and lithium ion battery comprising negative electrode |
| CN111326738A (en) * | 2019-12-30 | 2020-06-23 | 江苏载驰科技股份有限公司 | Binder for silicon-based negative electrode material and preparation method thereof |
| CN112687835A (en) * | 2020-12-25 | 2021-04-20 | 惠州亿纬创能电池有限公司 | Preparation method of negative electrode slurry |
| CN113363589A (en) * | 2021-05-19 | 2021-09-07 | 东莞维科电池有限公司 | Lithium ion battery and preparation method thereof |
| CN113839042A (en) * | 2021-09-17 | 2021-12-24 | 惠州亿纬锂能股份有限公司 | Lithium-supplementing anode slurry and preparation method and application thereof |
| CN114226340A (en) * | 2021-12-17 | 2022-03-25 | 格林美（无锡）能源材料有限公司 | Method for removing residual alkali of high-nickel anode material by water washing and obtained anode material |
| WO2022080766A1 (en) * | 2020-10-12 | 2022-04-21 | 주식회사 엘지에너지솔루션 | Cathode slurry composition for lithium secondary battery, cathode, and lithium secondary battery comprising same |
| CN114551799A (en) * | 2022-01-11 | 2022-05-27 | 惠州锂威新能源科技有限公司 | Negative electrode slurry and preparation method thereof, negative electrode plate and lithium ion battery |
| CN115172644A (en) * | 2022-08-11 | 2022-10-11 | 江西嘉盛新能源有限公司 | 14500 steel shell cylindrical sodium-ion battery anode strip and preparation method thereof |
| WO2023282668A3 (en) * | 2021-07-08 | 2023-03-02 | 주식회사 엘지에너지솔루션 | Cathode slurry composition for lithium secondary battery, cathode comprising same, and lithium secondary battery |
| WO2023282672A3 (en) * | 2021-07-08 | 2023-03-02 | 주식회사 엘지에너지솔루션 | Cathode slurry composition for lithium secondary battery, cathode comprising same, and lithium secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20190267609A1 (en) * | 2018-02-26 | 2019-08-29 | Ningde Amperex Technology Limited | Negative electrode and lithium ion battery comprising negative electrode |
| CN111326738A (en) * | 2019-12-30 | 2020-06-23 | 江苏载驰科技股份有限公司 | Binder for silicon-based negative electrode material and preparation method thereof |
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| CN112687835A (en) * | 2020-12-25 | 2021-04-20 | 惠州亿纬创能电池有限公司 | Preparation method of negative electrode slurry |
| CN113363589A (en) * | 2021-05-19 | 2021-09-07 | 东莞维科电池有限公司 | Lithium ion battery and preparation method thereof |
| WO2023282668A3 (en) * | 2021-07-08 | 2023-03-02 | 주식회사 엘지에너지솔루션 | Cathode slurry composition for lithium secondary battery, cathode comprising same, and lithium secondary battery |
| WO2023282672A3 (en) * | 2021-07-08 | 2023-03-02 | 주식회사 엘지에너지솔루션 | Cathode slurry composition for lithium secondary battery, cathode comprising same, and lithium secondary battery |
| CN113839042A (en) * | 2021-09-17 | 2021-12-24 | 惠州亿纬锂能股份有限公司 | Lithium-supplementing anode slurry and preparation method and application thereof |
| CN114226340A (en) * | 2021-12-17 | 2022-03-25 | 格林美（无锡）能源材料有限公司 | Method for removing residual alkali of high-nickel anode material by water washing and obtained anode material |
| CN114551799A (en) * | 2022-01-11 | 2022-05-27 | 惠州锂威新能源科技有限公司 | Negative electrode slurry and preparation method thereof, negative electrode plate and lithium ion battery |
| CN115172644A (en) * | 2022-08-11 | 2022-10-11 | 江西嘉盛新能源有限公司 | 14500 steel shell cylindrical sodium-ion battery anode strip and preparation method thereof |
| CN115172644B (en) * | 2022-08-11 | 2023-06-16 | 江西嘉盛新能源有限公司 | 14500 steel shell cylindrical sodium ion battery positive plate and preparation method thereof |
| CN117334917A (en) * | 2023-12-01 | 2024-01-02 | 宁德时代新能源科技股份有限公司 | Secondary battery and electricity utilization device |
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